Exodus 21:20, 26-27

“And if a man beats his male or female servant with a rod, so that he dies under his hand, he shall surely be punished.

“If a man strikes the eye of his male or female servant, and destroys it, he shall let him go free for the sake of his eye. And if he knocks out the tooth of his male or female servant, he shall let him go free for the sake of his tooth.